The interviews were carried out after a joint investigation by the Health Products Regulatory Authority and the gardai into the controversial treatment, being promoted in Ireland by an international cult.

The substance is known as Miracle Mineral Solution (MMS) – however it is really just an industrial strength bleach.

It claims that it cures a number of medical conditions, including autism and AIDS.

The Genesis II Church of Health and Healing is led by former Scientologist Jim Humble.

It is understood a dentist and a nurse are among those questioned about the controversial treatment.

However there is currently no legislation in place here to ban parents treating their children with MMS.

The product makers are able to circumvent current legislation by describing MMS as a water purifier.

The HPRA is continuing its investigations into MMS.

This has been hampered by recent adverse publicity, which has forced distributors underground – however there have been several searches and seizures over the last 12 months.